Lifting mechanism and range hood provided with same

Abstract

A lifting mechanism comprises a driving motor, a screw rod, a shear type movement mechanism, an upper supporting table and a lower supporting table, the screw rod is horizontally arranged and installed on an output shaft of the driving motor, the upper portion of the shear type movement mechanism is movably arranged on the upper supporting table, and the lower portion of the shear type movement mechanism is movably arranged on the lower supporting table. The upper portion of the shear type movement mechanism is further connected to the screw rod, and under driving of the driving motor, the upper portion of the shear type movement mechanism horizontally moves along the screw rod to drive the lower supporting table to do lifting motion relative to the upper supporting table. The lifting mechanism is driven by the driving motor, the upper portion of the shear type movement mechanism moves horizontally along the screw rod to drive the lower supporting table to do lifting motion relative to the upper supporting table, the lifting mechanism converts horizontal motion of the screw rod into lifting motion in the vertical direction, the lower supporting table can be driven to move stably, the overall size is small, and cost is low. The extractor hood adopting the lifting mechanism can ensure that the whole extractor hood does not incline or shake in the lifting process.

Description

Technical Field

[0001] This utility model relates to range hoods, and more particularly to a lifting mechanism and a range hood equipped with the lifting mechanism. Background Technology

[0002] Chinese cooking produces a lot of oil fumes. To maintain a clean kitchen environment and protect human health, range hoods have become an indispensable piece of equipment in modern family kitchens. The height of the negative pressure zone of a range hood directly affects its fume extraction efficiency. If the distance between the range hood's air inlet and the area where the fumes are generated is large, the extraction path of the fumes is longer, increasing the extraction time and making it easier for fumes to escape during cooking. Lowering the installation height of the range hood, while improving the extraction effect, will result in a smaller cooking space, making it easier for the cook's head to accidentally hit the fume hood. Furthermore, a lower installation height also affects visibility and the overall appearance of the kitchen. To address this, people invented liftable range hoods, such as the Chinese invention patent application No. 201310136828.5 (authorization announcement No. CN 104101010A) which discloses "A Range Hood with Manually Liftable Smoke Collection Chamber". This range hood has a movable smoke collection chamber that can be lifted up and down at the rear of the inner cavity of the casing. The top of the movable smoke collection chamber is connected to the lower end of the lifter, and the upper end of the lifter is fixed to the reinforcing rib of the casing. The height of the smoke collection chamber of the range hood can be adjusted arbitrarily during cooking by the control panel to achieve the best smoke extraction effect. For example, the Chinese utility model patent No. 201320075819.5 (authorization announcement No. CN203215771U) discloses a "lifting range hood". This lifting range hood has a flat, ultra-thin smoke hood installed at the bottom of the range hood body. The smoke hood has a main smoke inlet on the front. A lifting mechanism is also set in the body to drive the smoke hood to move up and down. When in use, the smoke hood is lowered to absorb the oil fumes. When not in use, the smoke hood is raised and hidden in the range hood body. Lifting range hoods all have lifting mechanisms installed inside. Conventional lifting mechanisms use a motor to drive a vertical screw for lifting. Some use a motor to drive a steel wire for vertical lifting, and some use chain drive. Some existing lifting mechanisms are usually set inside the fan frame, occupying the oil fume channel. On the one hand, this will affect the performance of the fan and the oil fume absorption effect. On the other hand, the position of the force of the mechanism is far from the center of gravity of the range hood, which can easily cause the whole machine to tilt during the lifting process. Utility Model Content

[0003] The first technical problem to be solved by this utility model is to provide a lifting mechanism with a simple structure and smooth lifting movement, in light of the above-mentioned existing technology.

[0004] The second technical problem to be solved by this utility model is to provide a range hood with a smooth lifting process and less tendency for the whole machine to tilt, in light of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: a lifting mechanism, characterized in that it includes a drive motor, a screw, a scissor motion mechanism, an upper support platform and a lower support platform. The screw is horizontally arranged and mounted on the output shaft of the drive motor. The upper part of the scissor motion mechanism is movably arranged on the upper support platform, and the lower part of the scissor motion mechanism is movably arranged on the lower support platform. The upper part of the scissor motion mechanism is also connected to the screw. Under the drive of the drive motor, the upper part of the scissor motion mechanism moves horizontally along the screw, thereby driving the lower support platform to move up and down relative to the upper support platform.

[0006] The upper support platform is a fixed platform, the lower support platform is a lifting platform, the upper part of the scissor motion mechanism is limited on the upper support platform and can only move horizontally relative to the upper support platform, and the lower part of the scissor motion mechanism is limited on the lower support platform and can only move horizontally relative to the lower support platform.

[0007] The upper and lower support platforms can have various structures. Preferably, the upper support platform includes a first connecting plate and a second connecting plate that are connected and fixed to each other. The second connecting plate is located below the first connecting plate, and the upper part of the scissor motion mechanism is limited between the first and second connecting plates. The lower support platform includes a third connecting plate and a fourth connecting plate that are connected and fixed to each other. The fourth connecting plate is located below the third connecting plate, and the lower part of the scissor motion mechanism is limited between the third and fourth connecting plates.

[0008] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: a range hood, including an upper box and a lower box, wherein the lifting mechanism is installed between the upper box and the lower box, and the lower box moves up and down relative to the upper box under the drive of the lifting mechanism.

[0009] To avoid oil fume contamination of the lifting mechanism, preferably, the upper and lower housings have interconnected oil fume channels, and the lifting mechanism is located outside the oil fume channels.

[0010] The lower housing has a smoke inlet chamber and a cooking chamber located in front of the smoke inlet chamber. The smoke inlet chamber is located upstream of the fume duct and is isolated from the cooking chamber. The lifting mechanism is located at the top of the cooking chamber and is situated entirely in front of the smoke inlet chamber. This arrangement ensures that the installation position of the lifting mechanism does not affect the internal air duct for fume extraction and does not adversely impact the fume extraction effect.

[0011] In order for the lifting mechanism to drive the lower box to move up and down relative to the upper box, the upper support platform of the lifting mechanism is fixed to the bottom of the upper box, and the lower support platform of the lifting mechanism is fixed to the top of the lower box.

[0012] In order to enable the lifting mechanism to smoothly drive the lower box to move up and down, the lifting mechanism is located below the upper box and in the area centered on the left and right sides above the lower box.

[0013] To reduce friction during the lifting and lowering of the lower housing and make its movement smoother, a vertical guide rail is installed between the upper and lower housings. Driven by the lifting mechanism, the lower housing moves up and down relative to the upper housing along the vertical guide rail.

[0014] In order to ensure that the lower housing can move smoothly and avoid tilting and shaking during the lifting process, the upper housing includes a fan frame, and the vertical guide rails are provided on the left, right and rear side walls of the fan frame.

[0015] Compared with existing designs, the advantages of this utility model are as follows: the screw of the lifting mechanism is horizontally set and installed on the output shaft of the drive motor, and the upper part of the scissor motion mechanism is movably set on the upper support platform. Under the drive of the drive motor, the upper part of the scissor motion mechanism moves horizontally along the screw, thereby driving the lower support platform to move up and down relative to the upper support platform. This lifting mechanism converts the horizontal movement of the screw into vertical movement, which can drive the lower support platform to move smoothly. Moreover, the overall size is small. The range hood using this lifting mechanism can ensure that the whole machine does not tilt or shake during the lifting process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lifting mechanism according to an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the lifting mechanism according to an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the range hood according to an embodiment of the present utility model (in a lowered state);

[0019] Figure 4 for Figure 3 The image shows the front view of the range hood.

[0020] Figure 5 for Figure 3 The side view of the range hood shown;

[0021] Figure 6 This is a schematic diagram of the structure of the range hood according to an embodiment of the present invention (in the raised state);

[0022] Figure 7for Figure 6 The image shows a side view of the range hood. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 and Figure 2 As shown, the lifting mechanism in this embodiment includes a drive motor 1, a screw 2, a scissor mechanism 3, an upper support platform 4, and a lower support platform 5. The screw 2 is horizontally mounted on the output shaft of the drive motor 1, and the drive motor 1 drives the screw 2 to rotate. The scissor mechanism 3 can refer to existing structures, with the upper support platform 4 being a fixed platform and the lower support platform 5 being a lifting platform. The upper part of the scissor mechanism 3 is movably mounted on the upper support platform 4 and can only move horizontally relative to the upper support platform. The upper part of the scissor mechanism 3 is also connected to the screw 2. The lower part of the scissor mechanism 3 is movably mounted on the lower support platform 5 and can only move horizontally relative to the lower support platform 5. Driven by the drive motor 1, the upper part of the scissor mechanism 3 moves horizontally along the screw 2, causing the lower support platform 5 to move up and down relative to the upper support platform 4.

[0025] In this embodiment, the upper support platform 4 includes a first connecting plate 41 and a second connecting plate 42 that are connected and fixed to each other. The second connecting plate 42 is located below the first connecting plate 41. The upper part of the scissor motion mechanism 3 is limited between the first connecting plate 41 and the second connecting plate 42. The lower support platform 5 includes a third connecting plate 51 and a fourth connecting plate 52 that are connected and fixed to each other. The fourth connecting plate 52 is located below the third connecting plate 51. The lower part of the scissor motion mechanism 3 is limited between the third connecting plate 51 and the fourth connecting plate 52.

[0026] like Figures 3 to 7 As shown, the range hood in this embodiment is a lift-type range hood, including an upper housing and a lower housing. A lifting mechanism is installed between the upper and lower housings. Driven by the lifting mechanism, the lower housing can move up and down relative to the upper housing. The upper and lower housings have a connected fume duct 6. The lifting mechanism is located outside the fume duct 6. Therefore, when the range hood is working, it can avoid fume contamination of the lifting mechanism, effectively ensuring the reliability of the lifting mechanism.

[0027] The lower housing in this embodiment includes a smoke inlet chamber 7 and a cooking chamber located in front of the smoke inlet chamber 7. The smoke inlet chamber 7 is located upstream of the fume duct 6 and is isolated from the cooking chamber 8. The cooking chamber can perform steaming and baking functions. The lifting mechanism is located at the top of the cooking chamber 8 and is situated in front of the smoke inlet chamber 7. The lifting mechanism is located below the upper housing and in the centrally located area above the lower housing. The upper support platform 4 of the lifting mechanism is fixed to the bottom of the upper housing, and the lower support platform 5 of the lifting mechanism is fixed to the top of the lower housing. Since the lower housing moves up and down under the action of the lifting mechanism, installing the lifting mechanism in the above-mentioned positions ensures that the force application position of the lifting mechanism is close to the center of gravity of the range hood, thus preventing the range hood from tilting during the lifting process. In addition, the upper housing includes a fan frame 10, and vertical guide rails 9 are provided on the left and right side walls and the rear side wall of the fan frame 10. Driven by the lifting mechanism, the lower housing moves up and down relative to the upper housing along the vertical guide rails 9. After setting the vertical guide rails 9, the lower housing can move smoothly and avoid tilting and shaking during the lifting process.

Claims

1. A lifting mechanism, characterized in that: It includes a drive motor (1), a screw (2), a scissor mechanism (3), an upper support platform (4), and a lower support platform (5). The screw (2) is horizontally arranged and mounted on the output shaft of the drive motor (1). The upper part of the scissor mechanism (3) is movably arranged on the upper support platform (4), and the lower part of the scissor mechanism (3) is movably arranged on the lower support platform (5). The upper part of the scissor mechanism (3) is also connected to the screw (2). Under the drive of the drive motor (1), the upper part of the scissor mechanism (3) moves horizontally along the screw (2), thereby driving the lower support platform (5) to move up and down relative to the upper support platform (4).

2. The lifting mechanism according to claim 1, characterized in that: The upper support platform (4) is a fixed platform, the lower support platform (5) is a lifting platform, the upper part of the scissor motion mechanism (3) is limited on the upper support platform (4) and can only move horizontally relative to the upper support platform (4), and the lower part of the scissor motion mechanism (3) is limited on the lower support platform (5) and can only move horizontally relative to the lower support platform (5).

3. The lifting mechanism according to claim 1, characterized in that: The upper support platform (4) includes a first connecting plate (41) and a second connecting plate (42) that are connected and fixed to each other. The second connecting plate (42) is located below the first connecting plate (41). The upper part of the scissor motion mechanism (3) is limited between the first connecting plate (41) and the second connecting plate (42). The lower support platform (5) includes a third connecting plate (51) and a fourth connecting plate (52) that are connected and fixed to each other. The fourth connecting plate (52) is located below the third connecting plate (51). The lower part of the scissor motion mechanism (3) is limited between the third connecting plate (51) and the fourth connecting plate (52).

4. A range hood, comprising an upper housing and a lower housing, characterized in that: A lifting mechanism as described in any one of claims 1 to 3 is installed between the upper box and the lower box, and the lower box moves up and down relative to the upper box under the drive of the lifting mechanism.

5. The range hood according to claim 4, characterized in that: The upper and lower housings have interconnected fume ducts (6), and the lifting mechanism is located outside the fume ducts (6).

6. The range hood according to claim 5, characterized in that: The lower housing has a smoke inlet chamber (7) and a cooking chamber (8) located in front of the smoke inlet chamber (7). The smoke inlet chamber (7) is located upstream of the fume duct (6). The smoke inlet chamber (7) and the cooking chamber (8) are isolated from each other. The lifting mechanism is located on the top of the cooking chamber (8) and is located entirely in front of the smoke inlet chamber (7).

7. The range hood according to claim 4, characterized in that: The upper support platform (4) of the lifting mechanism is fixed to the bottom of the upper box, and the lower support platform (5) of the lifting mechanism is fixed to the top of the lower box.

8. The range hood according to claim 7, characterized in that: The lifting mechanism is located below the upper housing and in the area centered on the left and right sides above the lower housing.

9. The range hood according to claim 4, characterized in that: A vertical guide rail (9) is installed between the upper and lower boxes. Driven by the lifting mechanism, the lower box moves up and down relative to the upper box along the vertical guide rail (9).

10. The range hood according to claim 9, characterized in that: The upper housing includes a fan frame (10), and the vertical guide rails (9) are provided on the left and right side walls and the rear side wall of the fan frame (10).

Images